Coulson, C.A.
Valence
Oxford University Press, 1972
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Tanya Fitriyani
Tingkat kepadatan dalam Commuter Line serta hubungannya dengan fluktuasi valensi dan arousal penumpang = Level of density in Commuter Line and its relation with passengers valence and arousal fluctuations
2016
UI - Skripsi Membership
Murrel, J.N.
Valence theory
John Wiley & Sons, 1965
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Gordon, Robert Aaron
Business fluctuations
Harper & Brothers, 1952
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Chambers, Edward J.
Economic fluctuations and forecasting
Prentice-Hall, 1961
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