APA

American Petroleum Institute A., . (2020). Product Evaluation, Application, and Testing of Stage Cementing Collars. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2020. Product Evaluation, Application, and Testing of Stage Cementing Collars. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2020). Product Evaluation, Application, and Testing of Stage Cementing Collars. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Product Evaluation, Application, and Testing of Stage Cementing Collars. Washington: American Petroleum Institute, API. 2020.