APA

American Petroleum Institute A., . (1991). Training and qualification of liquid pipeline controllers. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1991. Training and qualification of liquid pipeline controllers. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1991). Training and qualification of liquid pipeline controllers. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Training and qualification of liquid pipeline controllers. Washington: American Petroleum Institute, API. 1991.