Gaya APA

Heffner, L, J., Schust, D, J. (2014). The Reproductive System at a Glance (4). : Wiley BlackWell.

Gaya MLA

Heffner, Linda, J.., Schust, Danny, J.. "The Reproductive System at a Glance". 4 : Wiley BlackWell, 2014. Text.