RetrieveAPIView

views.py

from rest_framework.generics import (
    ListAPIView,
    CreateAPIView,
    RetrieveAPIView,  #Detailview
    DestroyAPIView,
    UpdateAPIView,
    RetrieveUpdateAPIView,
)

class PersonDetailView(RetrieveAPIView):

    serializer_class= PersonSerializer
    queryset= Person.objects.all() #en vez de all se puede poner el filter

serializer.py

from .models import Person, Reunion, Hobby

class PersonSerializer(serializers.ModelSerializer):
    class Meta:
        model=Person
        fields=(
            '__all__'
        )

urls.py

    path(
        'api/persona/detail/<pk>',
        views.PersonDetailView.as_view(),
        name=''
    ),