Gaya APA

Corporation, P, T. (1995). Pro/ENGINEER Drawing User's Guide Release 16.0 (Release 16.0). Waltham, Massachusetts: Parametric Technology Corporation (PTC).

Gaya MLA

Corporation, Parametric, Technology. "Pro/ENGINEER Drawing User's Guide Release 16.0". Release 16.0 Waltham, Massachusetts: Parametric Technology Corporation (PTC), 1995. Text.