Cita APA (7th ed.)
Bird, R., & Moor, O. d. (1997). Algebra of programming. Prentice Hall.
Cita Chicago (17th ed.)
Bird, Richard, i Oege de Moor. Algebra of Programming. London ; New York: Prentice Hall, 1997.
Cita MLA (9th ed.)
Bird, Richard, i Oege de Moor. Algebra of Programming. Prentice Hall, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.