Gaya APA

Ridgeway, Hallas H.. (1990). Drainage . : TRB.

Gaya Chicago

Ridgeway, Hallas H.. Drainage. : TRB, 1990. Chart.

Gaya MLA

Ridgeway, Hallas H.. Drainage. : TRB, 1990. Chart.

Gaya Turabian

Ridgeway, Hallas H.. Drainage. : TRB, 1990. Chart.