APA-referens (7:e uppl.)

Nickolaisen, R. H. (2002). Study guide for certification of geometric dimensioning and tolerancing professionals (GDTP) in accordance with the ASME Y14.5.2-2000 standard. ASME Press. https://doi.org/10.1115/1.801888

Chicago-referens (17:e uppl.)

Nickolaisen, Robert H. Study Guide for Certification of Geometric Dimensioning and Tolerancing Professionals (GDTP) in Accordance with the ASME Y14.5.2-2000 Standard. New York, N.Y: ASME Press, 2002. https://doi.org/10.1115/1.801888.

MLA-referens (9:e uppl.)

Nickolaisen, Robert H. Study Guide for Certification of Geometric Dimensioning and Tolerancing Professionals (GDTP) in Accordance with the ASME Y14.5.2-2000 Standard. ASME Press, 2002. https://doi.org/10.1115/1.801888.