(1967). On the track of discovery. Progress.
Chicago Style (17. basım) AtıfOn the Track of Discovery. Moscow: Progress, 1967.
MLA (9th ed.) AtıfOn the Track of Discovery. Progress, 1967.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..
(1967). On the track of discovery. Progress.
Chicago Style (17. basım) AtıfOn the Track of Discovery. Moscow: Progress, 1967.
MLA (9th ed.) AtıfOn the Track of Discovery. Progress, 1967.