APA (7th ed.) Citation

Ortega, A. (1981). Building ecologically: A seminar. Centre for Human Settlements, University of British Columbia.

Chicago Style (17th ed.) Citation

Ortega, Alvaro. Building Ecologically: A Seminar. [Vancouver]: Centre for Human Settlements, University of British Columbia, 1981.

MLA (9th ed.) Citation

Ortega, Alvaro. Building Ecologically: A Seminar. Centre for Human Settlements, University of British Columbia, 1981.