APA Format
Trumbull, Charles P; Trumbull, Charles P. (2002).
Encyclopedia Britannica :2001 year in review /editor , Charles P. Trumbull Charles
. : Encyclopedia Britannica,.
MLA Format
Trumbull, Charles P; Trumbull, Charles P.
Encyclopedia Britannica :2001 year in review /editor , Charles P. Trumbull Charles
. : Encyclopedia Britannica,, 2002
Chicago Format
Trumbull, Charles P; Trumbull, Charles P. Encyclopedia Britannica :2001 year in review /editor , Charles P. Trumbull Charles. : Encyclopedia Britannica,, 2002.