APA (7th ed.) Citation

Allegra, L., Braga, P. C., & Dal Negro, R. (1993). Methods in asthmology. Springer.

Chicago Style (17th ed.) Citation

Allegra, Luigi, Pier Carlo Braga, and Roberto Dal Negro. Methods in Asthmology. Berlin [etc.]: Springer, 1993.

MLA (9th ed.) Citation

Allegra, Luigi, et al. Methods in Asthmology. Springer, 1993.