Παραπομπή APA

Hu, S. T. (1972). Elements of general topology. Holden-Day.

Παραπομπή Chicago Style

Hu, S. T. Elements of General Topology. San Francisco: Holden-Day, 1972.

Παραπομπή MLA

Hu, S. T. Elements of General Topology. Holden-Day, 1972.