Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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