MLA

O'Regan, and Gerard O'Regan. Concise Guide to Formal Methods. Springer International Publishing, 2017.

APA

O'Regan, O., & O'Regan, G. (2017). Concise Guide to Formal Methods. Springer International Publishing.

Chicago

O'Regan, and Gerard O'Regan. Concise Guide to Formal Methods. : Springer International Publishing, 2017.