Gaya APA

Perera, W, R, -, P. et al (1994). Use of Nondestructive Testing in Evaluating Composite Pavements . England: Federal Highway Administration.

Gaya MLA

Perera, W., Rohan, -, P. et al. "Use of Nondestructive Testing in Evaluating Composite Pavements". England: Federal Highway Administration, 1994. Text.