Παραπομπή APA

Barth, L. G. Embryology: : 2nd ed (2nd ed.).

Παραπομπή Chicago Style

Barth, Lester George. Embryology: : 2nd Ed. 2nd ed.

Παραπομπή MLA

Barth, Lester George. Embryology: : 2nd Ed. 2nd ed.