APA (7e ed.) Bronvermelding

ebrary, Inc, & Upham, P. (2003). Towards sustainable aviation. Earthscan Publications.

Chicago (17e ed.) Bronvermelding

ebrary, Inc, en Paul Upham. Towards Sustainable Aviation. London ; Sterling, VA: Earthscan Publications, 2003.

MLA (9e ed.) Bronvermelding

ebrary, Inc, en Paul Upham. Towards Sustainable Aviation. Earthscan Publications, 2003.