APA (7th ed.) Citation

Cook, A. H. (1969). Gravity and the earth. Wykeham Publ.

Chicago Style (17th ed.) Citation

Cook, Alan H. Gravity and the Earth. London [u.a.]: Wykeham Publ, 1969.

MLA (9th ed.) Citation

Cook, Alan H. Gravity and the Earth. Wykeham Publ, 1969.