Gaya APA
Rischer, C, E., Easton, T, A. (1992).
Focus and human biology / Carl E. Rischer, Thomas A. Easton .
New York:
Harper Collins.
Gaya MLA
Rischer, Carl, E.., Easton, Thomas, A.
"Focus and human biology / Carl E. Rischer, Thomas A. Easton".
New York:
Harper Collins,
1992.
Textbook.