Gaya APA
Barker, D. J. P.. (1982).
Practical Epidemiology (3 ed.).
London:
Churchill Livingstone.
Gaya Chicago
Barker, D. J. P..
Practical Epidemiology.
3 ed.
London:
Churchill Livingstone,
1982.
Text.
Gaya MLA
Barker, D. J. P..
Practical Epidemiology.
3 ed.
London:
Churchill Livingstone,
1982.
Text.
Gaya Turabian
Barker, D. J. P..
Practical Epidemiology.
3 ed.
London:
Churchill Livingstone,
1982.
Print.