Ariani, Dorothea Wahyu (2011) Manajemen Operasi Jasa. Universitas Terbuka, Jakarta. ISBN 9789790116412
Contractor, Farok J and Kumar, Vikas (2011) GLOBAL OUTSOURCING AND OFFSHORING. Cambridge University Press. ISBN 978-0-521-19353-5
Freud, Sigmund (2011) GROUP PSYCHOLOGY AND THE ANALYSIS OF THE EGO. University of Michigan, United States of America.
Libby, Robert (2011) FINANCIAL ACCOUNTING. Mc-Graw Hill.
PR Smith, PR Smith (2011) MARKETING COMMUNICATIONS INTEGRATING OFFLINE AND ONLINE WITH SOCIAL MEDIA. Kogan Page.
Pearson, Judy C (2011) HUMAN COMMUNICATION. Mc-Graw Hill.
Stallings, William (2011) CRYPTOGRAPHY AND NETWORK SECURITY PRINCIPLES AND PRACTICE. Prentice Hall.
Wariyah, Chatarina and Riyanto, Riyanto (2011) Sifat Fisik Dan Akseptabilitas Minuman Gel Lidah Buaya (Aloe vera var. chinensis). ( Physical Properties and Acceptability of Aloe vera (Aloe vera var. chinensis) Gel Drink) . Patpi, Manado. ISBN 978-602-98902-1-1
Wiroso, Wiroso (2011) PRODUK PERBANKAN SYARIAH. LPFE Usakti, Jakarta Barat. ISBN 978-979-3634-15-9