APA (7th ed.) Citation

Crawford, H. J., & Christensen, L. (1991). Developing research skills: A laboratory manual (2nd ed.). Allyn and Bacon.

Chicago Style (17th ed.) Citation

Crawford, Helen J., and Larry Christensen. Developing Research Skills: A Laboratory Manual. 2nd ed. Boston: Allyn and Bacon, 1991.

MLA (9th ed.) Citation

Crawford, Helen J., and Larry Christensen. Developing Research Skills: A Laboratory Manual. 2nd ed. Allyn and Bacon, 1991.