APA (7th ed.) Citation

O, A. Z., E, A. N., & Fawzi, F. A. Dividing Graceful Labeling of Certain Tree Graphs. Tikrit University.

Chicago Style (17th ed.) Citation

O, Abdullah Zahraa, Arif Nabeel E, and F. A. Fawzi. Dividing Graceful Labeling of Certain Tree Graphs. Tikrit University.

MLA (9th ed.) Citation

O, Abdullah Zahraa, et al. Dividing Graceful Labeling of Certain Tree Graphs. Tikrit University.

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