APA

Yerby F., . (1964). The serpent and the staff. USA: Pocket Books.

Chicago

Yerby Frank, . 1964. The serpent and the staff. USA: Pocket Books.

Harvard

Yerby F., . (1964). The serpent and the staff. USA: Pocket Books.

MLA

Yerby Frank, . The serpent and the staff. USA: Pocket Books. 1964.