Gaya APA
U.M.I Disertation information service :. (1992).
Michigan:
A Bell Howell Information Company.
Gaya Chicago
U.M.I Disertation information service :.
.
Michigan:
A Bell Howell Information Company,
1992.
Textbook.
Gaya MLA
U.M.I Disertation information service :.
.
Michigan:
A Bell Howell Information Company,
1992.
Textbook.
Gaya Turabian
U.M.I Disertation information service :.
Michigan:
A Bell Howell Information Company,
1992.
Textbook.