Cita APA (7a ed.)

Heater, D. (1990). Our world today (New ed., 2. ed.). Oxford Univ. Press.

Cita Chicago Style (17a ed.)

Heater, Derek. Our World Today. New ed., 2. ed. Oxford [u.a.]: Oxford Univ. Press, 1990.

Cita MLA (9a ed.)

Heater, Derek. Our World Today. New ed., 2. ed. Oxford Univ. Press, 1990.