APA Style

Halsey, W, D., Friedman, E. (1986). Collier's encyclopedia: with bibliography and index 21 (Volume 21). New York: Macmillan Educational Company.

MLA Style

Halsey, William, D., Friedman, Emanuel. "Collier's encyclopedia: with bibliography and index 21". Volume 21 New York: Macmillan Educational Company, 1986. Perpustakaan KALBIS.