APA (7th ed.) Citation

Hamer, F., & Hamer, J. (1977). Clays / (by) Frank and JanetHamer. Pitman (etc.).

Chicago Style (17th ed.) Citation

Hamer, Frank, and Janet Hamer. Clays / (by) Frank and JanetHamer. London: Pitman (etc.), 1977.

MLA (9th ed.) Citation

Hamer, Frank, and Janet Hamer. Clays / (by) Frank and JanetHamer. Pitman (etc.), 1977.

Warning: These citations may not always be 100% accurate.