Gaya APA

Crowell, R, H., I.Fox, R, H. (1963). **Knot theory . New York: New York: Blaisdell; 1963.

Gaya MLA

Crowell, Richard, H., I.Fox, Ralph, H. "**Knot theory". New York: New York: Blaisdell; 1963, 1963. Text.