APA

American Petroleum Institute A., . (2001). Four-inch hydrant system components and arrangements. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2001. Four-inch hydrant system components and arrangements. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2001). Four-inch hydrant system components and arrangements. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Four-inch hydrant system components and arrangements. Washington: American Petroleum Institute, API. 2001.