APA-referens (7:e uppl.)

Ladip-Ladwingon, R. R., Valdez, A. B., & Mariani, M. J. P. (2019). The 21st century skills of the ALS graduates enrolled in the College of Engineering and Information Technology: A basis for college policy recommendation.

Chicago-referens (17:e uppl.)

Ladip-Ladwingon, Ruth R., Angeline B. Valdez, och Mathew Jun P. Mariani. The 21st Century Skills of the ALS Graduates Enrolled in the College of Engineering and Information Technology: A Basis for College Policy Recommendation. 2019.

MLA-referens (9:e uppl.)

Ladip-Ladwingon, Ruth R., et al. The 21st Century Skills of the ALS Graduates Enrolled in the College of Engineering and Information Technology: A Basis for College Policy Recommendation. 2019.