Yin, Zhenglin
Zhongguo shu xin jing dian = 中国书信精典 = Chinese classical letters
Shandong Daxue chubanshe, 2000
 Buku Teks
Muhammad Nida` Fadlan
Surat-surat eyang hasan maolani lengkong suntingan teks dan analisis isi = The letters of eyang hasan maolani from lengkong editing text and content analysis
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2015
 UI - Tesis Membership
Said Nursi
The letters / Said Nursi
Kaynak, 1998
 Buku Teks
Chandra Rujianto
Meretas ideologi tekstual dalam screwtape letters
2010
 UI - Tesis Open
Ellinger, E.P.
Documentary letters of credit a comparative study/ E.P. Ellinger
University of Singapore Press, 1970
 Buku Teks