APA (7th ed.) Citation

Gibbs, P. (1931). Since then (Cheap ed.). Heinemann.

Chicago Style (17th ed.) Citation

Gibbs, Philip. Since Then. Cheap ed. London: Heinemann, 1931.

MLA (9th ed.) Citation

Gibbs, Philip. Since Then. Cheap ed. Heinemann, 1931.

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