APA (7th ed.) Citation

Howitt, D., & Cramer, D. (2014). Introduction to research methods in psychology (4. ed.). Prentice Hall.

Chicago Style (17th ed.) Citation

Howitt, Dennis, and Duncan Cramer. Introduction to Research Methods in Psychology. 4. ed. Harlow [u.a.]: Prentice Hall, 2014.

MLA (9th ed.) Citation

Howitt, Dennis, and Duncan Cramer. Introduction to Research Methods in Psychology. 4. ed. Prentice Hall, 2014.