Cita APA (7th ed.)
Vriesenga, D. Trees and plants: Grades 1-2. Instructional fair.
Cita Chicago (17th ed.)
Vriesenga, Daryl. Trees and Plants: Grades 1-2. Michigan: Instructional fair.
Cita MLA (9th ed.)
Vriesenga, Daryl. Trees and Plants: Grades 1-2. Instructional fair.
Atenció: Aquestes cites poden no estar 100% correctes.