APA
Aston R., . (1990). Principles of biomedical instrument. Columbus: Merrill Pub. Co.
Chicago
Aston Richard, . 1990. Principles of biomedical instrument. Columbus: Merrill Pub. Co.
Harvard
Aston R., . (1990). Principles of biomedical instrument. Columbus: Merrill Pub. Co.
MLA
Aston Richard, . Principles of biomedical instrument. Columbus: Merrill Pub. Co. 1990.