Citazione Stile APA (7a Edizione)

Gitterman, M., & Halpern, V. (1981). Qualitative analysis of physical problems. Academic Press.

Citazione stile Chigago Style (17a edizione)

Gitterman, M., e V. Halpern. Qualitative Analysis of Physical Problems. Nueva York: Academic Press, 1981.

Citatione MLA (9a ed.)

Gitterman, M., e V. Halpern. Qualitative Analysis of Physical Problems. Academic Press, 1981.