Foley, John Miles, editor
theory of oral composition: history and methodology/John Miles Foley
Indiana University Press, 1988
 Buku Teks SO
Organizing for product development / editor Albert Newgarden
American Management Associations, Inc , 1959
 Buku Teks SO
Organizing for product development / editor Albert Newgarden
American Management Associations, Inc , 1959
 Buku Teks SO
Field, Oliver P.
Bates and Field's State Governmen/Oliver P. Fields, Pressly S. Sikes, John E. Stoner
Harper, 1949
 Buku Teks
Potgieter E.J.
Albert
W.E.J. Tjeenk Willink, 1914
 Buku Teks