Παραπομπή σε μορφή APA (7η εκδ.)

McGill University. Industrial Relations Centre, Pathy, A. C., & Loerick, G. (1979). The Problem of "essentia services": Inconvenience, importance, or emergency. Industrial Relations Centre.

Παραπομπή σε μορφή Chicago (17η εκδ.)

McGill University. Industrial Relations Centre, Alexander C. Pathy, και Glenna Loerick. The Problem of "Essentia Services": Inconvenience, Importance, or Emergency. Montreal: Industrial Relations Centre, 1979.

Παραπομπή σε μορφή MLA (9th εκδ.)

McGill University. Industrial Relations Centre, et al. The Problem of "Essentia Services": Inconvenience, Importance, or Emergency. Industrial Relations Centre, 1979.