APA
WASIK B., . (2011). Improving Vocabulary and Pre-Literacy Skills of At-Risk Preschoolers Through Teacher Professional Development. Washington: American Psychological Association.
Chicago
WASIK Barbara, . 2011. Improving Vocabulary and Pre-Literacy Skills of At-Risk Preschoolers Through Teacher Professional Development. Washington: American Psychological Association.
Harvard
WASIK B., . (2011). Improving Vocabulary and Pre-Literacy Skills of At-Risk Preschoolers Through Teacher Professional Development. Washington: American Psychological Association.
MLA
WASIK Barbara, . Improving Vocabulary and Pre-Literacy Skills of At-Risk Preschoolers Through Teacher Professional Development. Washington: American Psychological Association. 2011.