APA引文

Environmental Education Project (Portland, Or.). (1978). Clearing. Environmental Education Project.

Chicago Style (17th ed.) Citation

Environmental Education Project (Portland, Or.). Clearing. Portland, Or.: Environmental Education Project, 1978.

MLA引文

Environmental Education Project (Portland, Or.). Clearing. Environmental Education Project, 1978.

警告：這些引文格式不一定是100％准確.