Gaya APA

Krebs, Robert D.. (1971). Highway materials . : McGraw-Hill Book Co..

Gaya Chicago

Krebs, Robert D.. Highway materials. : McGraw-Hill Book Co., 1971. Text.

Gaya MLA

Krebs, Robert D.. Highway materials. : McGraw-Hill Book Co., 1971. Text.

Gaya Turabian

Krebs, Robert D.. Highway materials. : McGraw-Hill Book Co., 1971. Print.