APA (7th ed.) Citation

Siegler, R. S., & Jenkins, E. (1989). How children discover new strategies (2. print.). Lawrence Erlbaum.

Chicago Style (17th ed.) Citation

Siegler, Robert S., and Eric Jenkins. How Children Discover New Strategies. 2. print. Hillsdale, NJ [u.a.]: Lawrence Erlbaum, 1989.

MLA (9th ed.) Citation

Siegler, Robert S., and Eric Jenkins. How Children Discover New Strategies. 2. print. Lawrence Erlbaum, 1989.