Gaya APA
U.M.I. Dissertation information service :. (1991).
Michigan:
A Bell Howel.
Gaya Chicago
U.M.I. Dissertation information service :.
.
Michigan:
A Bell Howel,
1991.
Textbook.
Gaya MLA
U.M.I. Dissertation information service :.
.
Michigan:
A Bell Howel,
1991.
Textbook.
Gaya Turabian
U.M.I. Dissertation information service :.
Michigan:
A Bell Howel,
1991.
Textbook.