Crowell, R. H., & Williamson, R. E. (1962). Calculus of vector functions. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Crowell, Richard H., agus Richard E. Williamson. Calculus of Vector Functions. Englewood Cliffs, N.J: Prentice-Hall, 1962.
Lua MLA (9ú heag.)Crowell, Richard H., agus Richard E. Williamson. Calculus of Vector Functions. Prentice-Hall, 1962.
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