APA

Nasi A., Frare R. d. C., Brandão J. F., Falcão A. M., Muchelsohn N. H. & Sifrim D. (20091005). [Comparative prospective study of two positioning modes of 24-hour esophageal pH monitoring: by esophageal manometry and by the pH step-up technique]. : Arquivos de gastroenterologia.

Chicago

Nasi Ary, Frare Rita de Cássia, Brandão Jeovana F, Falcão Angela M, Muchelsohn Nelson H and Sifrim Daniel. 20091005. [Comparative prospective study of two positioning modes of 24-hour esophageal pH monitoring: by esophageal manometry and by the pH step-up technique]. : Arquivos de gastroenterologia.

Harvard

Nasi A., Frare R. d. C., Brandão J. F., Falcão A. M., Muchelsohn N. H. and Sifrim D. (20091005). [Comparative prospective study of two positioning modes of 24-hour esophageal pH monitoring: by esophageal manometry and by the pH step-up technique]. : Arquivos de gastroenterologia.

MLA

Nasi Ary, Frare Rita de Cássia, Brandão Jeovana F, Falcão Angela M, Muchelsohn Nelson H and Sifrim Daniel. [Comparative prospective study of two positioning modes of 24-hour esophageal pH monitoring: by esophageal manometry and by the pH step-up technique]. : Arquivos de gastroenterologia. 20091005.