Gaya APA

PARKER, A, D., BARRIE, D, S. (1984). PLANNING & ESTIMATING HEAVY CONSTRUCTION . New York: MC GRAW HILL.

Gaya MLA

PARKER, ALBERT, D.., BARRIE, DONALD, S.. "PLANNING & ESTIMATING HEAVY CONSTRUCTION". New York: MC GRAW HILL, 1984. Text.