Sinaga, Martha
Habit Profesional
Gramedia, 2006
 Buku Teks
Studying teacher's lives
edited by Ivor F. Goodson
Routledge, 1992
 Buku Teks
Henry, Nelson B.
In-service education for teachers, supervisor and administrators, the 56th yearbook of the national society for the study of education, part 1
University of Chicago, 1957
 Buku Teks
Hall, Gene Erwin 1941-
Introduction to teaching : making a difference in student learning
Sage, 2014
 Buku Teks
Criscito, Pat
Barron's guide to distance learning : degrees, certificates, courses
Barron's Educational Series, Inc., 1999
 Buku Referensi