APA (7th ed.) Citation

Thomas, R. (1990). The secret (1. publ.). Hutchinson.

Chicago Style (17th ed.) Citation

Thomas, Ruth. The Secret. 1. publ. London [u.a.]: Hutchinson, 1990.

MLA (9th ed.) Citation

Thomas, Ruth. The Secret. 1. publ. Hutchinson, 1990.

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