APA način citiranja

Hussain, I., Brady, C., Swinn, M., Mathias, C., & Fowler, C. (2001). Treatment of erectile dysfunction with sildenafil citrate (Viagra) in parkinsonism due to Parkinson's disease or multiple system atrophy with observations on orthostatic hypotension. BMJ Group.

Čikaški stil citiranja

Hussain, I., C. Brady, M. Swinn, C. Mathias, i C. Fowler. Treatment of Erectile Dysfunction With Sildenafil Citrate (Viagra) in Parkinsonism Due to Parkinson's Disease or Multiple System atrophy With Observations On Orthostatic Hypotension. BMJ Group, 2001.

MLA način citiranja

Hussain, I., et al. Treatment of Erectile Dysfunction With Sildenafil Citrate (Viagra) in Parkinsonism Due to Parkinson's Disease or Multiple System atrophy With Observations On Orthostatic Hypotension. BMJ Group, 2001.