APA (7th ed.) Citation

Singer, M. V. (2003). Preface. Best practice & research. Clinical gastroenterology, 17(4), . https://doi.org/10.1016/S1521-6918(03)00051-9

Chicago Style (17th ed.) Citation

Singer, Manfred V. "Preface." Best Practice & Research. Clinical Gastroenterology 17, no. 4 (2003). https://doi.org/10.1016/S1521-6918(03)00051-9.

MLA (9th ed.) Citation

Singer, Manfred V. "Preface." Best Practice & Research. Clinical Gastroenterology, vol. 17, no. 4, 2003, https://doi.org/10.1016/S1521-6918(03)00051-9.