APA
Lengrand P., . (1986). Areas of learning basic to lifelong education. UNESCO Institute for education, Hamburg: .
Chicago
Lengrand P, . 1986. Areas of learning basic to lifelong education. UNESCO Institute for education, Hamburg: .
Harvard
Lengrand P., . (1986). Areas of learning basic to lifelong education. UNESCO Institute for education, Hamburg: .
MLA
Lengrand P, . Areas of learning basic to lifelong education. UNESCO Institute for education, Hamburg: . 1986.