Citação norma APA

Penn, I., Chuang, E., Chuang, T., Lin, C., & Kao, C. (2019). Bidirectional association between migraine and fibromyalgia: Retrospective cohort analyses of two populations. BMJ Open.

Citação norma Chicago

Penn, I-Wen, Eric Chuang, Tien-Yow Chuang, Cheng-Li Lin, and Chia-Hung Kao. "Bidirectional Association between Migraine and Fibromyalgia: Retrospective Cohort Analyses of Two Populations." BMJ Open 2019.

Citação norma MLA

Penn, I-Wen, et al. "Bidirectional Association between Migraine and Fibromyalgia: Retrospective Cohort Analyses of Two Populations." BMJ Open 2019.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.