APA
LeFevre J., Smith-Chant B. L., Fast L., Skwarchuk S., Sargla E., Arnup J. S., Penner-Wilger M., Bisanz J. & Kamawar D. (20060725). What counts as knowing? The development of conceptual and procedural knowledge of counting from kindergarten through Grade 2. : Journal of experimental child psychology.
Chicago
LeFevre Jo-Anne, Smith-Chant Brenda L, Fast Lisa, Skwarchuk Sheri-Lynn, Sargla Erin, Arnup Jesse S, Penner-Wilger Marcie, Bisanz Jeffrey and Kamawar Deepthi. 20060725. What counts as knowing? The development of conceptual and procedural knowledge of counting from kindergarten through Grade 2. : Journal of experimental child psychology.
Harvard
LeFevre J., Smith-Chant B. L., Fast L., Skwarchuk S., Sargla E., Arnup J. S., Penner-Wilger M., Bisanz J. and Kamawar D. (20060725). What counts as knowing? The development of conceptual and procedural knowledge of counting from kindergarten through Grade 2. : Journal of experimental child psychology.
MLA
LeFevre Jo-Anne, Smith-Chant Brenda L, Fast Lisa, Skwarchuk Sheri-Lynn, Sargla Erin, Arnup Jesse S, Penner-Wilger Marcie, Bisanz Jeffrey and Kamawar Deepthi. What counts as knowing? The development of conceptual and procedural knowledge of counting from kindergarten through Grade 2. : Journal of experimental child psychology. 20060725.