Jacobson, W. J., & Lauby, C. J. K. (1968). Investigating in science. American book company.
Chicago Style aipamenaJacobson, Willard J., and Cecelia J Konicek Lauby. Investigating in Science. New York: American book company, 1968.
MLA aipamenaJacobson, Willard J., and Cecelia J Konicek Lauby. Investigating in Science. American book company, 1968.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.