Gaya APA

IPA, . (1992). Proceedings of the twenty fifth silver anniversary convention. volume 2. Emgineering, HRD, Procedding, safety and environment (1992). : Jakarta : IPA,.

Gaya MLA

IPA, . "Proceedings of the twenty fifth silver anniversary convention. volume 2. Emgineering, HRD, Procedding, safety and environment". 1992 : Jakarta : IPA,, 1992. Text.