Gaya APA
HEFFNER, L, J., SCHUST, D, J. (2014).
The reproductive system at a glance (4th ed.).
West Sussex:
Wiley-Blackell.
Gaya MLA
HEFFNER, Linda, J.., SCHUST, Danny, J..
"The reproductive system at a glance".
4th ed.
West Sussex:
Wiley-Blackell,
2014.
Buku.