Cita APA (7th ed.)

Landheer, B., & Essen, J. L. F. v. (1953). Fundamentals of public international law. A. W. Sitjhoff.

Cita Chicago (17th ed.)

Landheer, Bartholomeus, i Jan Louis Frederick van Essen. Fundamentals of Public International Law. Leyden: A. W. Sitjhoff, 1953.

Cita MLA (9th ed.)

Landheer, Bartholomeus, i Jan Louis Frederick van Essen. Fundamentals of Public International Law. A. W. Sitjhoff, 1953.