Besabe, N. O. S., Borlongan, B. J. S., Quimbo, S., & Horioka, C. (2014). Transportation and productivity: An analysis of the effects of transportation on a worker's productivity. School of Economics, University of the Philippines.

Besabe, Nathaniel Orion S., Bryan Joseph S. Borlongan, Stella Quimbo, and Charles Horioka. Transportation and Productivity: An Analysis of the Effects of Transportation on a Worker's Productivity. Quezon City: School of Economics, University of the Philippines, 2014.

Besabe, Nathaniel Orion S., et al. Transportation and Productivity: An Analysis of the Effects of Transportation on a Worker's Productivity. School of Economics, University of the Philippines, 2014.