APA

American Petroleum Institute A., . (2015). Evaluation and testing of mechanical cement wiper plugs. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2015. Evaluation and testing of mechanical cement wiper plugs. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2015). Evaluation and testing of mechanical cement wiper plugs. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Evaluation and testing of mechanical cement wiper plugs. Washington: American Petroleum Institute, API. 2015.