APA-referens (7:e uppl.)

Ryan, R. H., & Schifrin, L. G. (1959). Midland: The economic future of a Texas oil center. Bureau of Business Research. University of Texas.

Chicago-referens (17:e uppl.)

Ryan, Robert H., och Leonard G. Schifrin. Midland: The Economic Future of a Texas Oil Center. Austin: Bureau of Business Research. University of Texas, 1959.

MLA-referens (8:e uppl.)

Ryan, Robert H., och Leonard G. Schifrin. Midland: The Economic Future of a Texas Oil Center. Bureau of Business Research. University of Texas, 1959.