APA Style

Grappone, J., Couzin, G. (2010). Search engine optimization : an hour a day. Second Edition (Second Edition). San Francisco, CA: Sybex.

MLA Style

Grappone, Jennifer., Couzin, Gradiva. "Search engine optimization : an hour a day. Second Edition". Second Edition San Francisco, CA: Sybex, 2010. Text.