APA (7th ed.) Citation

Brown, M. W., Dillon, D., & Dillon, L. (2001). Two little trains. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Brown, Margaret Wise, Diane Dillon, and Leo Dillon. Two Little Trains. [New York]: HarperCollins Publishers, 2001.

MLA (8th ed.) Citation

Brown, Margaret Wise, et al. Two Little Trains. HarperCollins Publishers, 2001.