Creswell, John W. (2013) (E-BOOK): QUALITATIVE INQUIRY RESEARCH DESIGN. 3 ed. SAGE Publications, Inc.. ISBN 978-1-4129-9530-6

Dr. Hj. Nurhasanah Bakhtiar, M.Ag (2013) (E-BOOK): BAHASA AGAMA ISLAM UNTUK PERGURUAN TINGGI. Aswaja Pressindo, Jl. Plosokuning V No. 73 Minomartani, Ngaglik, Sleman Yogyakarta.. ISBN 978-602-18663-1-3

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

Springer (2013) (E-BOOK): ENGLISH FOR ACADEMIC WRITING RESEARCH. Springer. ISBN 978-1-4614-4298-1

Yukl, Gary (2013) (E-BOOK): LEADERSHIP IN ORGANIZATIONS. Pearson Education, Inc. ISBN 978-0-13-277186-3