Cita APA (7a ed.)

Langhammer, R. J., & Hiemenz, U. (1990). Regional integration among developing countries: Opportunities, obstacles, and options. J.C.B. Mohr (Paul Siebeck).

Cita Chicago Style (17a ed.)

Langhammer, Rolf J., y Ulrich Hiemenz. Regional Integration Among Developing Countries: Opportunities, Obstacles, and Options. Tübingen: J.C.B. Mohr (Paul Siebeck), 1990.

Cita MLA (9a ed.)

Langhammer, Rolf J., y Ulrich Hiemenz. Regional Integration Among Developing Countries: Opportunities, Obstacles, and Options. J.C.B. Mohr (Paul Siebeck), 1990.