Cotreau, J. D. (1975). Historical development of Universal Postal Union and the question of membership: Thesis for the conferment of the degree of Doctor of Laws submitted to the Faculty of Law, Economics and Social Sciences of the University of Fribourg, Fribourg, Switzerland. [wydawca nieznany].
Chicago-Zitierstil (17. Ausg.)Cotreau, James Donald. Historical Development of Universal Postal Union and the Question of Membership: Thesis for the Conferment of the Degree of Doctor of Laws Submitted to the Faculty of Law, Economics and Social Sciences of the University of Fribourg, Fribourg, Switzerland. Boston: [wydawca nieznany], 1975.
MLA-Zitierstil (9. Ausg.)Cotreau, James Donald. Historical Development of Universal Postal Union and the Question of Membership: Thesis for the Conferment of the Degree of Doctor of Laws Submitted to the Faculty of Law, Economics and Social Sciences of the University of Fribourg, Fribourg, Switzerland. [wydawca nieznany], 1975.