APA

Abercrombie M., Johnson M., . (1954). A Dictionary of biology. London: Penguin books.

Chicago

Abercrombie M, Johnson M.L, . 1954. A Dictionary of biology. London: Penguin books.

Harvard

Abercrombie M., Johnson M., . (1954). A Dictionary of biology. London: Penguin books.

MLA

Abercrombie M, Johnson M.L, . A Dictionary of biology. London: Penguin books. 1954.