Arms, K. (1987). Biology. Philadelphia: Saunders college pub.
Trích dẫn kiểu ChicagoArms, Karen. Biology. Philadelphia: Saunders college pub, 1987.
MLA CitationArms, Karen. Biology. Philadelphia: Saunders college pub, 1987.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.