Gaya APA

transportation, D, O. (1998). Highway engineering Field Formulas/Department of transportation (^a1 ^bJilid 1). Derptmnt of Transpotation: Washinton sate.

Gaya MLA

transportation, Department, Of. "Highway engineering Field Formulas/Department of transportation". ^a1 ^bJilid 1 Derptmnt of Transpotation: Washinton sate, 1998. Text.