Sukur, Silvester Goridus
Comprehensive English grammar for the toefl test : for beginners 1 = panduan lengkap menguasai grammat untuk / Silvester Goridus Sukur
Indonesia Cerdas, 2007
 Buku Teks SO
Dhanny R. Cyssco
English grammar practice for TOEFL preparation test / Dhanny R. Cyssco
Puspa Swara, 2004
 Buku Teks SO
Rosyid Anwar
Toefl Grammar Perfrct Score : Trip & Trik Lengkap Toefl structure dan Writtrn Expression
Bhuana Ilmu Populer, 2023
 Buku Teks
Makkink, H.J.
An English grammar
Nijgh and Van Ditmar, 1951
 Buku Teks SO
Ballantine, Joseph W.
Japanese as it is spoken : a beginners grammar
Stanford University, 1945
 Buku Teks SO