APA-viite (7. p.)

Legrand, W., Chen, J. S., & Laeis, G. C. M. (2023). Sustainability in the hospitality industry: Principles of sustainable operations (Fourth edition.). Routledge, Taylor & Francis Group.

Chicago-viite (17. p.)

Legrand, Willy, Joseph S. Chen, ja Gabriel C. M. Laeis. Sustainability in the Hospitality Industry: Principles of Sustainable Operations. Fourth edition. London, New York, NY: Routledge, Taylor & Francis Group, 2023.

MLA-viite (9. p.)

Legrand, Willy, et al. Sustainability in the Hospitality Industry: Principles of Sustainable Operations. Fourth edition. Routledge, Taylor & Francis Group, 2023.