APA Style

Barss, K. (2012). Martha Bakes a Cake (Green Light Readers, Level 2: Martha Speaks) . : Houghton Mifflin Harcourt.

MLA Style

Barss, Karen. "Martha Bakes a Cake (Green Light Readers, Level 2: Martha Speaks)". : Houghton Mifflin Harcourt, 2012. Text.