Brian Paltridge, editor; Sue Starfield, editor
Wiley-Blackwell, 2013
Buku Teks
disusun oleh Sofia Rangkuti-Hasibuan ; editor, Nung Atasana
Gramedia Pustaka Utama, 1992
Buku Teks
Hasibuan, Sofia
Gramedia, 1986
Buku Teks
Rangkuti-Hasibuan, Sofia
Gramedia, 1986
Buku Teks
edited by Gloria Poedjosoedarmo
SEAMEO Regional Language Centre, 2004
Buku Teks SO