Citazione APA

Engelking, R., & Sieklucki, K. (1968). Ountline of general topology. North Holland.

Stile di citazione Chicago

Engelking, R., e K. Sieklucki. Ountline of General Topology. Amsterdam: North Holland, 1968.

Citazione MLA

Engelking, R., e K. Sieklucki. Ountline of General Topology. North Holland, 1968.