Sumiyana, S., Z. Baridwan, S. Sugiri, and J. Hartono. “Accounting Fundamentals and the Variation of Stock Price: Factoring in the Investment Scalability”. Gadjah Mada International Journal of Business, Vol. 12, no. 2, May 2010, pp. 189 -29, https://journal.ugm.ac.id/v3/gamaijb/article/view/15269.