Cita APA

Halberg, F., Cornélissen, G., Katinas, G., Schwartzkopff, O., & Johnson, D. (2005). Theodor Hellbrügge: 85 years of age – Ad multos transannos, sanos, fortunatos et beatos. BioMed Central.

Chicago Style Citation

Halberg, Franz, Germaine Cornélissen, George Katinas, Othild Schwartzkopff, i Dana Johnson. Theodor Hellbrügge: 85 Years of Age – Ad Multos Transannos, Sanos, Fortunatos Et Beatos. BioMed Central, 2005.

Cita MLA

Halberg, Franz, et al. Theodor Hellbrügge: 85 Years of Age – Ad Multos Transannos, Sanos, Fortunatos Et Beatos. BioMed Central, 2005.