APA

American Petroleum Institute A., . (1992). Training and qualification of liquid pipeline maintenance personnel. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1992. Training and qualification of liquid pipeline maintenance personnel. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1992). Training and qualification of liquid pipeline maintenance personnel. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Training and qualification of liquid pipeline maintenance personnel. Washington: American Petroleum Institute, API. 1992.