APA

(2007). The new encyclopaedia Britannica, vol.15 Micropaedia : knowledge in depth : Birds-Chess. : Encyclopaedia Britannica Inc.

Chicago

2007. The new encyclopaedia Britannica, vol.15 Micropaedia : knowledge in depth : Birds-Chess. : Encyclopaedia Britannica Inc.

Harvard

(2007). The new encyclopaedia Britannica, vol.15 Micropaedia : knowledge in depth : Birds-Chess. : Encyclopaedia Britannica Inc.

MLA

The new encyclopaedia Britannica, vol.15 Micropaedia : knowledge in depth : Birds-Chess. : Encyclopaedia Britannica Inc. 2007.