Cita APA (7th ed.)

Barril, C. R., Tumlos, E. T., & Moraga, W. C. (2001). Seasonal variations in water quality of Laguna de Bay, Philippines: Trends and implications. Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist).

Cita Chicago (17th ed.)

Barril, C. R., E. T. Tumlos, i W. C. Moraga. "Seasonal Variations in Water Quality of Laguna De Bay, Philippines: Trends and Implications." Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist) 2001.

Cita MLA (9th ed.)

Barril, C. R., et al. "Seasonal Variations in Water Quality of Laguna De Bay, Philippines: Trends and Implications." Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist), 2001.