Book

Wibowo, Danang Harry and Rahayu, Ratih and Wibowo, Erwin and Isnaeni, Mukhammad and Luthfiah, Devi and Ardian, Dina and MR, Yuliadi and Kartono, Bambang and Anggraini, Dian (2008) Laras Bahasa : fobia Bahasa indonesia. Kantor Bahasa Provinsi Lampung, Bandar Lampung. ISBN 978-979~5-7~9

Nasution, Hasnawati and Rahayu, Ratih and Wibowo, Erwin and Harum, Meutia Diah and Moses, Ferdinandus (2008) Persebaran bahasa-bahasa di Provinsi Lampung. Kantor Bahasa Provinsi Lampung, Lampung. ISBN 9789796857654