APA   Click to copy
Patni, M. J., Parkash, O., & Bahadur, D. (1980). Characterisation of bubble materials. Bulletin of Materials Science, 2, 83–89.

Chicago/Turabian   Click to copy
Patni, M.J., O. Parkash, and D. Bahadur. “Characterisation of Bubble Materials.” Bulletin of Materials Science 2 (1980): 83–89.

MLA   Click to copy
Patni, M. J., et al. “Characterisation of Bubble Materials.” Bulletin of Materials Science, vol. 2, 1980, pp. 83–89.

@article{patni1980a,
  title = {Characterisation of bubble materials},
  year = {1980},
  journal = {Bulletin of Materials Science},
  pages = {83-89},
  volume = {2},
  author = {Patni, M.J. and Parkash, O. and Bahadur, D.}
}