Cita APA (7a ed.)

Walker, W. O. (1991). Opium and foreign policy: The Anglo-American search for order in Asia, 1912 - 1954. Univ. of North Carolina Press.

Cita Chicago Style (17a ed.)

Walker, William O. Opium and Foreign Policy: The Anglo-American Search for Order in Asia, 1912 - 1954. Chapel Hill [u.a.]: Univ. of North Carolina Press, 1991.

Cita MLA (9a ed.)

Walker, William O. Opium and Foreign Policy: The Anglo-American Search for Order in Asia, 1912 - 1954. Univ. of North Carolina Press, 1991.