Dyfyniad APA

SCHEFLER,William.C. (1976). BIOLOGY: PRINCIPLES AND ISSUES. ADDISON-WESLEY publishing company.

Dyfyniad Arddull Chicago

SCHEFLER,William.C. BIOLOGY: PRINCIPLES AND ISSUES. USA: ADDISON-WESLEY publishing company, 1976.

Dyfyniad MLA

SCHEFLER,William.C. BIOLOGY: PRINCIPLES AND ISSUES. ADDISON-WESLEY publishing company, 1976.

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