APA (7th ed.) Citation

Please, C., Pettet, G., & McElwain, D. (1999). Avascular tumour dynamics and necrosis.

Chicago Style (17th ed.) Citation

Please, C., G. Pettet, and D. McElwain. Avascular Tumour Dynamics and Necrosis. 1999.

MLA (9th ed.) Citation

Please, C., et al. Avascular Tumour Dynamics and Necrosis. 1999.