Dyfyniad APA

Haskel, S., & Sygoda, D. (1977). Contemporary Biology. Amsco School Publications, Inc.

Dyfyniad Arddull Chicago

Haskel, Sebastian, and David Sygoda. Contemporary Biology. New York, NY: Amsco School Publications, Inc, 1977.

Dyfyniad MLA

Haskel, Sebastian, and David Sygoda. Contemporary Biology. Amsco School Publications, Inc, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.