Cita APA (7a ed.)

Ross, C. S., & MacDonald, B. H. (1989). Problems and Solutions: A New Project of Enumerative Bibliography.

Cita Chicago Style (17a ed.)

Ross, Catherine Sheldrick, y Bertrum H. MacDonald. Problems and Solutions: A New Project of Enumerative Bibliography. 1989.

Cita MLA (9a ed.)

Ross, Catherine Sheldrick, y Bertrum H. MacDonald. Problems and Solutions: A New Project of Enumerative Bibliography. 1989.