APA (7th ed.) Citation

New Advent, Inc, & Knight, K. (1995). The Catholic encyclopedia. New Advent.

Chicago Style (17th ed.) Citation

New Advent, Inc, and Kevin Knight. The Catholic Encyclopedia. [Denver, Colo.?]: New Advent, 1995.

MLA (9th ed.) Citation

New Advent, Inc, and Kevin Knight. The Catholic Encyclopedia. New Advent, 1995.

Warning: These citations may not always be 100% accurate.