APA

Beadle G. W., Emerson R. & Whitaker D. M. (2011). A series of biology texts. : .

Chicago

Beadle George W, Emerson Ralph and Whitaker Douglas M. 2011. A series of biology texts. : .

Harvard

Beadle G. W., Emerson R. and Whitaker D. M. (2011). A series of biology texts. : .

MLA

Beadle George W, Emerson Ralph and Whitaker Douglas M. A series of biology texts. : . 2011.