APA   Click to copy
Brahma, P., Chakravorty, D., Singh, K., & Bahadur, D. (1990). Preparation of barium hexagonal ferrites by sol-gel method. Journal of Materials Science Letters, 9, 1438–1440.

Chicago/Turabian   Click to copy
Brahma, P, D Chakravorty, K Singh, and D Bahadur. “Preparation of Barium Hexagonal Ferrites by Sol-Gel Method.” Journal of materials science letters 9 (1990): 1438–1440.

MLA   Click to copy
Brahma, P., et al. “Preparation of Barium Hexagonal Ferrites by Sol-Gel Method.” Journal of Materials Science Letters, vol. 9, Kluwer Academic Publishers, 1990, pp. 1438–40.

@article{brahma1990a,
  title = {Preparation of barium hexagonal ferrites by sol-gel method},
  year = {1990},
  journal = {Journal of materials science letters},
  pages = {1438--1440},
  publisher = {Kluwer Academic Publishers},
  volume = {9},
  author = {Brahma, P and Chakravorty, D and Singh, K and Bahadur, D}
}