Creswell, John W. (2013) (E-BOOK): QUALITATIVE INQUIRY RESEARCH DESIGN. 3 ed. SAGE Publications, Inc.. ISBN 978-1-4129-9530-6
Dr. Sugiyono, Prof. (2013) (E-BOOK): METODE PENELITIAN KUANTITATIF, KUALITATIF, DAN R&D. CV. ALFABETA Bandung. ISBN 979-8433-64-0
Dye, Thomas R. (2013) (E-BOOK): UNDERSTANDING PUBLIC POLICY. Pearson Education, Inc. ISBN 978-0-205-23882-8
Prof. Dr. Sugiyono (2013) (E-BOOK): METODE PENELITIAN KUANTITATIF, KUALITATIF, DAN R&D. ALFABETA. ISBN 979-8433-64-0
Setiawan, S.Sos., M.AP, Dr. Irza (2013) (E-BOOK): SOSIOLOGI DALAM ASPEK PEMBANGUNAN MORAL. CV. HEMAT Publishing, Jl. Pembalah Batung Paliwara Amuntai Hulu Sungai Utara Kalimantan Selatan. ISBN 978-602-17397-4-7
Yukl, Gary (2013) (E-BOOK): LEADERSHIP IN ORGANIZATIONS. Pearson Education, Inc. ISBN 978-0-13-277186-3