Group techniques / Gerald Corey ...[et al.].
Brooks/Cole Publishing , 1982
Buku Teks SO
Techniques in bioproductivity and photosynthesis/ edited by J. Coombs... (et al.)
Pergamon Press, 1985
Buku Teks
In-depik interviewing principles, techniques, anlysis/ Victor Minichiello et all
Longman, 1995
Buku Teks SO
In-depth interviewing: principles, techniques, analysis / Victor Minichiello ...[et al.]
Longman, 1996
Buku Teks
Geomorphological techniques / edited for the British Geomorphological Research Group by Andrew Goudie...[et al.]
Routledge , 1990
Buku Teks