@article{paperid:1076183,
author = {Soltanian, Nahid and Ghabanchi, Zargham and سعید رضایی and Pishghadam, Reza},
title = {Quantifying Investment in Language Learning: Model and Questionnaire Development and Validation in the Iranian Context},
journal = {Issues in Language Teaching},
year = {2018},
volume = {7},
number = {1},
month = {June},
issn = {2322-3715},
pages = {25--56},
			numpages = {31},
keywords = {Investment; language learning; model; questionnaire; validity; reliability; EFL learners},
}