Cita APA (7th ed.)

Burrill, C. W., & Knudsen, J. R. (1969). Real variables. Holt, Rinehart and Winston.

Cita Chicago (17th ed.)

Burrill, Claude W., i John R. Knudsen. Real Variables. New York: Holt, Rinehart and Winston, 1969.

Cita MLA (8th ed.)

Burrill, Claude W., i John R. Knudsen. Real Variables. Holt, Rinehart and Winston, 1969.