APA Style
McHenry, R. (1993).
The New Encyclopaedia Britannica Vol. 6 (15th Edition).
United States of America:
Encyclopaedia Britannica, Inc..
MLA Style
McHenry, Robert.
"The New Encyclopaedia Britannica Vol. 6".
15th Edition
United States of America:
Encyclopaedia Britannica, Inc.,
1993.
Text.