Great books of the western world : 12 Lucretus, Epictetus, Marcus Aurelius
Robert Maynard Hutchins, editor in chief
Encyclopaedia Britannica, Inc., 1952
 Buku Referensi
Dialogues of Plato : apology, crito, phaedo, symposium, republic
edited by J.D. Kaplan
Pocket Library, 1950
 Buku Teks SO
Priestley, M.B.
Spectral analysis and time series : multivariate series, prediction and control; Vol. 2
Academic Press, 1981
 Buku Teks SO
Sutrisno Hadi
Bimbingan menulis skripsi thesis Jilid 2
Yayasan Penerbitan Fakultas Psikologi UGM, 1984
 Buku Teks SO
Time series analysis : theory and practice 2. Proceedings of the International Conference held in Dublin, Ireland, March 1982
edited by O.D. Anderson
North-Holland , 1982
 Buku Teks SO