Citations to classical works are slightly different than those you may encounter when doing research in other disciplines. Here are some examples of what you may encounter:
1) Citations that contain:
Example:
"As for the Greeks’ long-term cultural debt to the Minoans, it is notable that even in much later generations (the epics of Homer, for example) the Cretans – now ‘Greeks’ – were famed for their dance-floors and musical performances (e.g. Homer Iliad 16.617, 18.590–2, etc.)"¹
The citation in bold refers to line 617 of book 16 and lines 590-592 of book 18 in Homer's Iliad.
2) Citations that reference authoritative and/or well-known editions. These editions may use similar subdivisions as the aforementioned example, but may cite the author of the edition, rather than the original author of the text.
Example:
"Companionship and pleasure are implicitly on the agenda again when Theognis of Megara comments that it is only under compulsion that one mingles at the symposion hosted by a chatterbox, hated for talking unstintingly (295-8 W)."²
The citation in bold refers to lines 295-298 of the Theognidea, found in West, M. L. (1989–92) Iambi et Elegi Graeci ante Alexandrum Cantati, 2nd edition, Oxford.
Examples taken from:
¹Mark Griffith, "'Telling the tale’: a performing tradition from Homer to pantomime," in The Cambridge Companion to Greek and Roman Theatre, ed. Marianne McDonald and J. Michael Walton (Cambridge: Cambridge University Press, 2007), 14.
²Fiona Hobden, The Symposion in Ancient Greek Society and Thought (Cambridge: Cambridge University Press, 2013), 7-8.