Bickley, Verner C.
Poems to enjoy; Vol. 2
University of London Press, 1960
Buku Teks SO
Bickley, Verner C.
Poems to enjoy; Vol. 1,2,3.4 and 5
University of London Press, 1960
Buku Teks SO
POEMS TO ENJOY
Buku Teks
Encyclopedia of mathematics Vol. 1
Kluwer Academic Publishers, 1995,
Buku Referensi
Gambhir, R.S.
Introductory physics; Vol. 1
McGraw-Hill, 1980
Buku Teks SO