Gaya APA

Johnson, R, G. (1967). Evolution International Journal Of Organic Evolution (Vol. 12, Edisi Desember 1967, No.4). United States of America: The Society For The Study Of Evolution.

Gaya MLA

Johnson, Ralph, G.. "Evolution International Journal Of Organic Evolution". Vol. 12, Edisi Desember 1967, No.4 United States of America: The Society For The Study Of Evolution, 1967. Text.