APA

amos j., butler j., . (1997). animals. london: two-can publishingltd.

Chicago

amos janine, butler john, . 1997. animals. london: two-can publishingltd.

Harvard

amos j., butler j., . (1997). animals. london: two-can publishingltd.

MLA

amos janine, butler john, . animals. london: two-can publishingltd. 1997.