APA

American Petroleum Institute A., . (1996). Recommended practice for planning, designing, and constructing heliports for fixed offshore platforms. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1996. Recommended practice for planning, designing, and constructing heliports for fixed offshore platforms. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1996). Recommended practice for planning, designing, and constructing heliports for fixed offshore platforms. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Recommended practice for planning, designing, and constructing heliports for fixed offshore platforms. Washington: American Petroleum Institute, API. 1996.