APA ציטוט

Ritchie, A. J., & Gibbons, J. R. (1990). Plastic bullets in Northern Ireland.

Citação norma Chicago

Ritchie, A J., and J R. Gibbons. Plastic Bullets in Northern Ireland. 1990.

ציטוט MLA

Ritchie, A J., and J R. Gibbons. Plastic Bullets in Northern Ireland. 1990.