APA (7th ed.) Citation

Abdullah, S. (2011). Observations of f-region critical frequency variation over Batu Pahat, Malaysia during low solar activity.

Chicago Style (17th ed.) Citation

Abdullah, Sabirin. Observations of F-region Critical Frequency Variation over Batu Pahat, Malaysia During Low Solar Activity. 2011.

MLA (9th ed.) Citation

Abdullah, Sabirin. Observations of F-region Critical Frequency Variation over Batu Pahat, Malaysia During Low Solar Activity. 2011.

Warning: These citations may not always be 100% accurate.