Goffman, C. (1965). Calculus of several variables. Harper and Row.
Lua i Stíl Chicago (17ú heag.)Goffman, Casper. Calculus of Several Variables. New York: Harper and Row, 1965.
Lua MLA (9ú heag.)Goffman, Casper. Calculus of Several Variables. Harper and Row, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.