Gaya APA

Porter, K, E, S, A, E. (1990). Urban Water Infrastructure (^a1 ^bJilid 1). Boston: Kluwer Academic Publishers.

Gaya MLA

Porter, Kyle, E., Schilling, And, Eric. "Urban Water Infrastructure". ^a1 ^bJilid 1 Boston: Kluwer Academic Publishers, 1990. Text.