APA (7th ed.) Citation

Awdry, W., & Courtney, R. (2012). Secret of the green engine. Random House.

Chicago Style (17th ed.) Citation

Awdry, W., and Richard Courtney. Secret of the Green Engine. New York: Random House, 2012.

MLA (8th ed.) Citation

Awdry, W., and Richard Courtney. Secret of the Green Engine. Random House, 2012.

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