APA

Abercrombie M., Hickman J. & Johnson M. L. (1980). The penguin dictionary of biology. London: Penguin Books.

Chicago

Abercrombie M, Hickman J.c and Johnson M L. 1980. The penguin dictionary of biology. London: Penguin Books.

Harvard

Abercrombie M., Hickman J. and Johnson M. L. (1980). The penguin dictionary of biology. London: Penguin Books.

MLA

Abercrombie M, Hickman J.c and Johnson M L. The penguin dictionary of biology. London: Penguin Books. 1980.