Harris, Robert A.
Using sources effectively : strengthening your writing and avoiding plagiarism
Pyrczak Pub, 2011
Buku Teks
Hybels, Saundra
Communicating effectively
McGraw-Hill, 1992
Buku Teks SO
Hybels, Saundra
Communicating effectively
McGraw-Hill, 1992
Buku Teks SO
Hybels, Saundra
Communicating effectively
McGraw-Hill, 1992
Buku Teks SO
Using public libraries: what makes a difference
Artikel Jurnal