Positron impact ionisation of He ion.

MLA

Nath, B., et al. “Positron Impact Ionisation of He Ion.” European Physical Journal D (EPJ D), vol. 11, no. 1, June 2000, pp. 31–36. EBSCOhost, https://doi.org/10.1007/s100530070102.

APA

Nath, B., Chattopadhyaya, S., & Sinha, C. (2000). Positron impact ionisation of He ion. European Physical Journal D (EPJ D), 11(1), 31–36. https://doi.org/10.1007/s100530070102

Chicago

Nath, B., S. Chattopadhyaya, and C. Sinha. 2000. “Positron Impact Ionisation of He Ion.” European Physical Journal D (EPJ D) 11 (1): 31–36. doi:10.1007/s100530070102.