Cita APA (7th ed.)

Chapel, H. (1999). Essentials of clinical immunology (4th ed.). Blackwell Science.

Cita Chicago (17th ed.)

Chapel, Helen. Essentials of Clinical Immunology. 4th ed. Abingdon, Oxon, OX, Malden, MA, USA: Blackwell Science, 1999.

Cita MLA (9th ed.)

Chapel, Helen. Essentials of Clinical Immunology. 4th ed. Blackwell Science, 1999.