Brinton, Laurel J.
The development of english aspectual system / Laurel J. Brinton
Cambridge University Press, 1988
 Buku Teks SO
Afiksasi derivasional pembentukan kata benda dalam bahasa inggeris=derivational affixation at the formed noun in english
 Artikel Jurnal
Henschel, Astrid
German verb drills
Passport Books, 1994
 Buku Teks SO
Widyantika Afiatna Maharani
Kesalahan bentuk verba kala lampau dalam tulisan mahasiswa pemelajar bahasa Inggris = Errors of past tense verbs usage in the writings of college students English learners
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2020
 UI - Tesis Membership
Chuang, Edward Chi-chang
English verbs at work as observed in published materials : a corpus of illustrative quotations
Kanazawa Institute of Technology Press, 1981
 Buku Referensi