Yin, Robert K., author
SAGE Publication, 1989
Buku Teks SO
Yin, Robert K., author
SAGE Publication, 1985
Buku Teks SO
Steven S. Coughlin, Selina A. Smith, and Maria E. Fernandez, editors
Oxford University Press, 2017
eBooks
Yin, Robert K., author
Rajawali, 2013
Buku Teks
Skilight Propessional Dev, 2000
Buku Teks