Boughey, Arthur S.
Man and the environment: an itroduction to human ecology and evolution
McMillan Publisher, 1975
 Buku Teks SO
English corpus linguistics : an itroduction / Charles F. Mayer
Cambridge University Press, 2002
 eBooks
Griffin, Ricky W.
Business
Pearson Education International, 2006
 Buku Teks
Griffin, Ricky W.
Business
Prentice-Hall, 2002
 Buku Teks
Wheeler, Bayard O.
Business
Harper & Row. Publisher, 1968
 Buku Teks