Cita APA (7a ed.)

Wade, J., & Wood, B. (2001). The Earth's 'missing' niobium may be in the core.

Cita Chicago Style (17a ed.)

Wade, J., y B. Wood. The Earth's 'Missing' Niobium May Be in the Core. 2001.

Cita MLA (9a ed.)

Wade, J., y B. Wood. The Earth's 'Missing' Niobium May Be in the Core. 2001.