Gaya APA
E., R., C., A, E., T. (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.