Gaya APA

Spencer, G, M., Loving, H, D, N. (2014). Engineering Graphics eighth edition (Eighth Edition). U.S.A: Pearson.

Gaya MLA

Spencer, Giesecke, Mitchell., Loving, Hill, Dygdon, Novak. "Engineering Graphics eighth edition". Eighth Edition U.S.A: Pearson, 2014. Text.