APA (7th ed.) Citation

Abdulaziz, O., Hashim, I., & Chowdhury, M. S. H. (2008). Solving variational problems by homotopy–perturbation method. John Wiley & Sons Inc.

Chicago Style (17th ed.) Citation

Abdulaziz, O., Ishak Hashim, and Md. Sazzad Hossien Chowdhury. Solving Variational Problems by Homotopy–perturbation Method. John Wiley & Sons Inc, 2008.

MLA (8th ed.) Citation

Abdulaziz, O., et al. Solving Variational Problems by Homotopy–perturbation Method. John Wiley & Sons Inc, 2008.