Παραπομπή σε μορφή APA (7η εκδ.)

Legrand, W., Sloan, P., & Chen, J. S. (2017). Sustainability in the hospitality industry: Principles of sustainable operations (Third edition.). Routledge.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Legrand, Willy, Philip Sloan, και Joseph S. Chen. Sustainability in the Hospitality Industry: Principles of Sustainable Operations. Third edition. Londo: Routledge, 2017.

Παραπομπή σε μορφή MLA (9th εκδ.)

Legrand, Willy, et al. Sustainability in the Hospitality Industry: Principles of Sustainable Operations. Third edition. Routledge, 2017.