Cita APA (7a ed.)

Strong, C. F. (1965). The twentieth century and the contemporary world (4. ed., 3. impression.). Univ. of London Press.

Cita Chicago Style (17a ed.)

Strong, C. F. The Twentieth Century and the Contemporary World. 4. ed., 3. impression. London: Univ. of London Press, 1965.

Cita MLA (9a ed.)

Strong, C. F. The Twentieth Century and the Contemporary World. 4. ed., 3. impression. Univ. of London Press, 1965.