Goffman, C. (1965). Calculus of several variables. Harper and Row.
Cita Chicago (17th ed.)Goffman, Casper. Calculus of Several Variables. New York: Harper and Row, 1965.
Cita MLA (9th ed.)Goffman, Casper. Calculus of Several Variables. Harper and Row, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.