APA Style
Labor,preterm. (1993).
Preterm birth (NULL).
NULL:
MC Graw Hill.
Chicago Style
Labor,preterm.
Preterm birth.
NULL
NULL:
MC Graw Hill,
1993.
Text.
MLA Style
Labor,preterm.
Preterm birth.
NULL
NULL:
MC Graw Hill,
1993.
Text.
Turabian Style
Labor,preterm.
Preterm birth.
NULL
NULL:
MC Graw Hill,
1993.
Print.