Cita APA (7th ed.)

Ritz, W. C., & Straits, W. (2019). A head start on science: Encouraging a sense of wonder (Second edition.). NSTA Press/National Science Teachers Association.

Cita Chicago (17th ed.)

Ritz, William C., i William Straits. A Head Start on Science: Encouraging a Sense of Wonder. Second edition. Arlington, Virginia: NSTA Press/National Science Teachers Association, 2019.

Cita MLA (9th ed.)

Ritz, William C., i William Straits. A Head Start on Science: Encouraging a Sense of Wonder. Second edition. NSTA Press/National Science Teachers Association, 2019.