Cita APA (7a ed.)

Ploeg, F. v. d. (1990). Advanced lectures in qualitative economics. Academic Press.

Cita Chicago Style (17a ed.)

Ploeg, Frederick van der. Advanced Lectures in Qualitative Economics. London: Academic Press, 1990.

Cita MLA (9a ed.)

Ploeg, Frederick van der. Advanced Lectures in Qualitative Economics. Academic Press, 1990.