APA (7th ed.) Citation

NP, K., JH, Y., CE, R., MD, F., & T, M. (2000). Responses to the prolonged head-up tilt followed by sublingual nitrate provocation in asymptomatic older adults. Age & Ageing, 29(5), 419. https://doi.org/10.1093/ageing/29.5.419

Chicago Style (17th ed.) Citation

NP, Kumar, Youde JH, Ruse CE, Fotherby MD, and Masud T. "Responses to the Prolonged Head-up Tilt Followed by Sublingual Nitrate Provocation in Asymptomatic Older Adults." Age & Ageing 29, no. 5 (2000): 419. https://doi.org/10.1093/ageing/29.5.419.

MLA (9th ed.) Citation

NP, Kumar, et al. "Responses to the Prolonged Head-up Tilt Followed by Sublingual Nitrate Provocation in Asymptomatic Older Adults." Age & Ageing, vol. 29, no. 5, 2000, p. 419, https://doi.org/10.1093/ageing/29.5.419.