Citazione Stile APA (7a Edizione)

Del Valle, G. A., Quilantang, R. J., Rosel, A. J., Hong, F. L., & Luis, P. C. (1993). The Center for research and development of volcanic materials for building.

Citazione stile Chigago Style (17a edizione)

Del Valle, Glenn A., Romher J.T Quilantang, Albert J.S Rosel, Froilan L. Hong, e Prosperidad C. Luis. The Center for Research and Development of Volcanic Materials for Building. 1993.

Citatione MLA (9a ed.)

Del Valle, Glenn A., et al. The Center for Research and Development of Volcanic Materials for Building. 1993.