APA (7e ed.) Bronvermelding

Kathleen Weidner Zoehfeld. (1994). What Lives in a Shell? (Let's-Read-and-Find-Out Science 1) (1.). HarperCollins.

Chicago (17e ed.) Bronvermelding

Kathleen Weidner Zoehfeld. What Lives in a Shell? (Let's-Read-and-Find-Out Science 1). 1. HarperCollins, 1994.

MLA (9e ed.) Bronvermelding

Kathleen Weidner Zoehfeld. What Lives in a Shell? (Let's-Read-and-Find-Out Science 1). 1. HarperCollins, 1994.